Spoiler Alert: Several fans have discovered information about Resident Evil 5 by hacking the demo that was released in Japan to find out about what weapons will be featured in the game, along with level names, and a list of enemies.

Speculation first started when we saw Chris Redfield kneeling down before a gravestone that said Jill Valentine, suggesting that Jill Valentine would be a part of Resident Evil 5, and now it seems that the player could play a part in ending her life.

If the list below is correct, you will face Jill twice in the game.

Majini
Majini_F
Majini_T
Majini_G
Majini_G2
Majini indiginous
Majini large
Majini soldier
Majini researcher
Majini speech (guy with the megaphone?)
Majini chainsaw
Majini gatling
Majini shotgun
Majini chieftain
Wife
Plaga_D
Plaga_E
Plaga_A
Plaga_B
Bike Majini
Dog normal
Dog boss
Stealth licker
Mantis
Uro 1 (I'm fairly certain the Uros are those wiggly wormy things we saw in the trailers)
Uro 2
Uro 3
U8
U8 child
Big bat
El Gigante
El Gigante Plagas
Irving
Irving Opt1
Irving Opt3
Irving Opt4
Jill 1
Jill 2
Wesker 1
Wesker 2
Wesker 3
Goat
Crow
Chicken
Fish
Snake
Crocodile
Rat
Spider

Goat's, Chickens, and Rats. Seems like there will be plenty to fight in Resident Evil 5, we can't wait!

Source: REHorror